<form action="{{url_for("myinfo")}}" method="GET">
    <div class="form-group">
        <button class="btn btn-primary btn-block">个人信息</button>
    </div>
</form>
<form action="{{url_for("myfile")}}" method="GET">
    <div class="form-group">
        <button class="btn btn-primary btn-block">我的文件</button>
    </div>
</form>

.main .functions-discription .function1 .flag{
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 60px;
    line-height: 60px;
    text-align: center;
    color: #fff;
    background: rgba(0,0,0,0.5);
}


<div class="flag"></div>

